D&D General Multiple Sources of Resistance?

[GreatestHonor]

What happens when a creature is resistant to a damage source more than once. For example, if a creature had resistance to lightning damage AND resistance to spells, would lightning bolt only deal 1/4 the normal damage or would only one source of resistacne be considered?

To be clear, I am not wondering about resistance and “take half damage”, only when specifically two different sources of damage resistance apply to the same situation. I’m hoping for an official ruling.

 

[GreatestHonor]

I can't speak for the 2024 PHB, but the 2014 says on page 197 that it would only count as one instance. "For example, if a creature has resistance to fire damage as well as resistance to all nonmagical damage, the damage of a nonmagical fire is reduced by half against the creature, not reduced by three quarters."

Thank you. This is the answer I was originally looking for